Exact Revision of the Ziegler-Nichols Frequency Response Method

M. Schlegel (Czech Republic)


Process Control, Robust Control; Non-Convex Optimization; PID Control; Autotuners


The main subject of this paper is to provide an ex act theoretically-based revision of the Ziegler–Nichols frequency-response method by solving the newly formulated robust design problem. It is shown that the original method can be considerably improved if a suitable point on the Nyquist curve is used instead of the ultimate point.

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